updater-1.2.4/lib/vagrant-hostsupdater/HostsUpdater.rb:132:in `+': no implicit conversion of nil into String

[FL-K]

updater-1.2.4/lib/vagrant-hostsupdater/HostsUpdater.rb:132:in+': no implicit conversion of nil into String
`

    config.hostsupdater.aliases = [
        'site.dev'
    ]